Fix typeof paren typo

[tykeal]

Please amend your commit to include a Signed-off-by (DCO) line. I will not accept contributions without one.

Here's the meaning behind said line: https://developercertificate.org/

The easiest way to do this would be to do the following:

git commit -as --amend

And then re-push your change

[topaxi]

Done